// 云函数入口文件
const cloud = require('wx-server-sdk')

cloud.init()

const db = cloud.database()

// 云函数入口函数
exports.main = async (event, context) => {
  const wxContext = cloud.getWXContext()

  let grades = event.myclass
  return  await db.collection('studentList').where({
    grades : grades
  }).get()
}